JPH0234306A - Manufacture of colored tile dry body - Google Patents

Abstract

PURPOSE:To uniformly disperse coloring pigment in particles by mixing the pigment while tile dry body containing 10% or less of moisture is being finely pulverized, compression molding the power and then pulverizing it. CONSTITUTION:Tile dry body containing 10% or less of moisture is filled together with tile dry body powder in a mixer capable of pulverizing in mixture such as a ready mixer, the mixture is pulverized and mixed for several min into fine powder, then compression molded by a roller converter, further pulver ized into several mm or less, thereby forming colored tile dry body. It is filled in a tile metal mold, pressure molded, and baked in a tile baking kiln. When the moisture of the body is 3-8%, it is mixed most efficiently with the pigment and granulate. In comparison with a conventional method, the pigment and the dry body loss due to adherence at the time of altering the color of the pigment can be reduced.

Description

[Detailed Description of the Invention] [Industrial Application Field] The base materials for wall tiles and floor tiles include those in which the entire base is colored without applying glaze, and those in which the base is colored in spots.
These are often made by press-molding raw material powder colored with pigments (some are not colored).The colored tile clay powder produced by the present invention is:
It can be widely used as a raw material for these unglazed wall tiles and floor tiles, and it greatly contributes to production.

[Prior Art] As a method for producing colored unglazed tile clay, first, a pigment is pulverized together with a tile clay raw material in a wet ball mill to create a slurry with the pigment mixed therein, or a tile clay raw material is mixed with no pigment. After grinding the chili powder with a wet ball mill to make a slurry, pigment is added and stirred to create a slurry in which the pigment is evenly mixed.

[Problems to be Solved by the Present Invention] When the pigment is ground together with the tile clay raw material in a wet ball mill, it is placed in the ball mill and in the slurry tank, and when the pigment is mixed in the slurry tank, it is mixed in the slurry tank, and/or Alternatively, when drying with a spray dryer, tile clay containing expensive pigments adheres to the inside of the spray dryer. When changing to a pigment of a different color, the adhering tile clay must be completely cleaned, which makes changing the pigment complicated and reduces yield and costs. ing.

Means for Solving Problem E] The present invention allows the pigment to be uniformly dispersed in the clay by pulverizing the dry tile clay which is not mixed with pigment and simultaneously mixing the colored pigment. By compression-molding the clay, which is difficult to handle as a fine powder, and then pulverizing it to a predetermined particle size, we solve the problem of pigments adhering to ball mills, slurry tanks, and/or spray dryers or filter presses.1 To enable the pigment of colored tile clay to be easily changed.

[Summary of the Invention] The present invention consists of a combination of two main steps. 1st
First, the tile clay, which has been dried to a moisture content of 10% or less, is put into a mixer that can be mixed and pulverized with color pigments, and the tile clay is pulverized at the same time as the pigment is mixed, thereby producing fine powder tiles with evenly dispersed pigments. Clay is prepared and then compression molded using a roller converter or the like so that it is easy to handle and has speckled particles, and then crushed to an appropriate particle size to produce colored tile clay granules.

[Example] A mixer (for example,
The mixture was crushed and mixed for 3 minutes to form a fine powder of 74 microns or less, then compression molded using a roller converter, and this was further crushed to 2 mm or less to form colored tile clay. I made a powder.

This was packed into a tile mold, pressure-molded at 200 kgf/cm'', fired in a tile firing kiln, and the color development was observed.The pigments were mixed together in the same ratio in a ball mill, dried in a spray dryer, and then under the same conditions. It was found that the pigment was dispersed in a similar uniformity compared to the one pressure-molded and fired.

If the mixing time in the mixer was set to less than 2 minutes, the tile clay was not sufficiently pulverized, and about 7% of the clay was 74 microns or more, and when the coloring was examined after molding and firing, there were uncolored spots. It was observed that the pigment was not uniformly dispersed.

Further, when the moisture content of the tile clay was 8 to 10%, the adhesion to the inner wall of the mixer was significant and the residual loss inside the mixer increased.

When the water content exceeds 10%, granulation occurs simultaneously with pulverization and mixing, which impedes uniform dispersion of the pigment.

When the moisture content of the tile clay is less than 3%, it becomes difficult to perform compression molding using roller buffing, and the flaking rate decreases, and when the moisture content is 1%, the flaking rate is less than 50%.

As a result, it was found that when the moisture content of the tile clay was 3% to 8%, it was possible to mix it with pigment most efficiently and to granulate it.

[Effects of the invention] By mixing the tile clay while finely pulverizing it, the pigment can be uniformly dispersed, and by compression molding and pulverizing it to the required particle size, the pigment can be uniformly dispersed into each particle. made it possible to do so.

By manufacturing colored tile clay through the above-mentioned process,
Compared to conventional methods, it reduces pigment and clay loss due to adhesion when changing pigment colors, eliminates the complexity and time loss of cleaning, and speeds up color changes and reduces production costs. It has a lot to do with industry.

Furthermore, by reducing the size of the mixer, small-scale production can be carried out efficiently, and test production, which is one of the most important tasks in industry, can be carried out quickly, making it a major contribution to industry.

Claims (1)

[Claims] Tile clay that has been dried to a moisture content of 10% or less is finely pulverized and colored pigment is mixed therein to prepare a fine tile clay powder in which the coloring pigment is uniformly dispersed.Then, this fine powder is compression molded and then ground. Colored tile clay powder (including granular particles)
manufacturing method.